function s1_hello(){
	echo "hello, world!"
	
}



function s2_tell_who_i_am(){
	echo "$(whoami)"
}


function s3_which_distro_do_i_use(){
	distro=$(grep '^NAME' /etc/os-release | awk -F= '{print $2}')

	
	echo "NAME=$distro"


}


function s4_view_my_cpu_arch(){
	uname -m
}


function s5_show_first_scsi_disk_size(){
	lsblk -l |\grep '^sda '|awk '{print $0.2}'
}

function s6_show_main_memory_size_in_megabytes(){
	free -m |grep "Mem:"|awk '{print $2}'
}

s1_hello
s2_tell_who_i_am
s3_which_distro_do_i_use
s4_view_my_cpu_arch
s5_show_first_scsi_disk_size
s6_show_main_memory_size_in_megabytes


